#include "apue.h"
#include <pthread.h>

void cleanup(void *arg) {
	printf("cleanup: %s\n", (char *)arg);
}

void *thr_fn1(void *arg) {
	printf("thread 1 start\n");
	pthread_cleanup_push(cleanup, "thread 1 first handler");
	pthread_cleanup_push(cleanup, "thread 1 second handler");
	printf("thread 1 push complete\n");
	if (arg)
		return ((void*)1);
	pthread_cleanup_pop(0);
	pthread_cleanup_pop(0);
	return ((void*)1);
}

void *thr_fn2(void *arg) {
	printf("thread 2 start\n");
	pthread_cleanup_push(cleanup, "thread 2 first handler");
	pthread_cleanup_push(cleanup, "thread 2 second handler");
	printf("thread 2 push complete\n");
	if (arg)
		pthread_exit((void*)2);
	pthread_cleanup_pop(0);
	pthread_cleanup_pop(0);
	pthread_exit((void*)2);
}

int main(void) {
	int err;
	pthread_t tid1, tid2;
	void *tret;

	err = pthread_create(&tid1, NULL, thr_fn1, (void*)1);
	if (err != 0)
		err_exit(err, "cannot create thread 1");
	err = pthread_create(&tid2, NULL, thr_fn2, (void*)1);
	if (err != 0)
		err_exit(err, "cannot create thread 2");

	err = pthread_join(tid1, &tret);
	if (err != 0)
		err_exit(err, "cannot join with thread 1");

	printf("thread 1 exit code %ld\n", (long)tret);
	
	err = pthread_join(tid2, &tret);
	if (err != 0)
		err_exit(err, "cannot join with thread 2");

	printf("thread 2 exit code %ld\n", (long)tret);

	exit(0);
}